Figure 2. Clinical presentation of erythrasma on the left inguinal fold.

Clinical examination also showed a central area of hypopigmentation with peripheral hyperpigmentation and scaling (circled in white) on his left inguinal fold (A). Wood lamp examination revealed a bright coral-pink fluorescence characteristic of erythrasma on the left inguinal fold (B). After six weeks of twice daily topical application of 2% mupirocin ointment, his previous lesion of erythrasma (circled in white) had resolved (C). Wood lamp examination was negative for erythrasma on his left inguinal fold; there was no residual coral-pink fluorescence (circled in white) after six weeks of topical 2% mupirocin ointment therapy (D).